Ripple Decoupling of Modular Multilevel Converter with Flux Cancelled Three-port Converter

Yifu Liu, Yunpeng Si, Mengzhi Wang, Zhengda Zhang, Chunhui Liu, Qin Lei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a new MMC topology with three-port converter that using customized LLC circuits to couple the SMs from same voltage level together. The fundamental and the 2nd order harmonic current ripple can be eliminated as their induced magnetic flux are cancelled in the coupled core. Thus, system power density and efficiency can be significantly improved since the capacitor size is much reduced. In addition, planar transformer design is applied due to its excellent low-profile characteristic and the related down-scale SM prototype is demonstrated. The Detailed simulation results of comparison between proposed topology and traditional MMC have been presented. Moreover, motor drive starting from zero frequency is also simulated. The SM preliminary experiments are also demonstrated and analyzed.

Original languageEnglish (US)
Title of host publicationECCE 2020 - IEEE Energy Conversion Congress and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4370-4373
Number of pages4
ISBN (Electronic)9781728158266
DOIs
StatePublished - Oct 11 2020
Event12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States
Duration: Oct 11 2020Oct 15 2020

Publication series

NameECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
CountryUnited States
CityVirtual, Detroit
Period10/11/2010/15/20

Keywords

  • flux cancellation
  • LLC
  • MMC
  • planar transformer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology

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